Kenwood FM Transceiver TK-481 Service Manual

Also see for FM Transceiver TK-481: User manual Instruction manual Specifications Instruction manual Service manual

62TK-480/481 SPECIFICATIONSGeneralFrequency RangeRX ......................................................... TK-480 : 851 to 870MHz TK-481 : 935 to 941MHzTX ......................................................... TK-480 : 806 to 825MHz (851 to 870MHz : Talk-Around)TK-481 : 896 to 902MHz (935 to 941MHz : Talk-Around)Systems .................................................... Maximum 32Groups ...................................................... Maximum 250Conventional Channels ............................. Maximum 600Channel Spacing ....................................... TK-480 : 25kHz (PLL channel step 12.5kHz)TK-481 : 12.5kHz (PLL channel step 12.5kHz)Battery Voltage ......................................... DC 7.5VBattery Life ............................................... More than 8 hours at 5-5-90 duty cycle with KNB-16A batteryTemperature Range .................................. –30°C to +60°C (–22°F to +140°F)Dimensions and WeightWith KNB-16A (1100mAh battery) ...... 135 (5.33) H x 58 (2.29) W x 34 (1.34) D mm (inch) 1.01lbs (460g)(Dimensions not including protrusions, weight includes antenna and belt hook)Receiver (Measurements made per TIA/EIA-603)RF Input Impedance ................................. 50ΩSensitivity12dB SINAD* ....................................... 0.30μVSelectivity* ............................................... TK-480 : 70dB± 25kHz TK-481 : 63dB± 12.5kHzIntermodulation* ...................................... TK-480 : 65dB± 25/50kHz TK-481 : 60dB± 12.5/25kHzSpurious (Except for IF 1/2)* .................... 70dBFrequency Stability ................................... TK-480 : ± 0.00025% (–30°C to +60°C)TK-481 : ± 0.00015% (–30°C to +60°C)Channel Spread ......................................... TK-480 : 19MHz TK-481 : 6MHzAudio Power Output ................................. 500mW at 16Ω less than 5% distortion* : Typical specificationsTransmitter (Measurements made per TIA/EIA-603)RF Power OutputHigh ...................................................... 2.5WLow ...................................................... 1WRF Output Impedance .............................. 50ΩSpurious .................................................... –60dBModulation ................................................ TK-480 : 16K0F3E, 16K0F1D, 15K0F2D, 14K0F3E, 14K0F1D, 13K0F2DTK-481 : 11K0F3E, 11K0F1D, 10K5F2DFM Noise .................................................. TK-480 : –45dB TK-481 : –40dBAudio Distortion ........................................ 5.0% or lessFrequency Stability ................................... TK-480 : ± 0.00025% (–30°C to +60°C)TK-481 : ± 0.00015% (–30°C to +60°C)Channel Spread ......................................... TK-480 : 64MHz TK-481 : 45MHz

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